Comparison
Premier Vitamin C and Quantum Vitamin C
Premier Vitamin C (Premier Research Labs) lists 6 distinct ingredients and Quantum Vitamin C (Quantum Nutrition Labs) 6 (rows of one ingredient counted once); 6 are on both labels. On the site's similarity measure, which compares ingredient lists (1 for the same list, rarer ingredients counting for more; amounts are not part of it), the two formulas score 1.00: the same ingredients, at the amounts in the table below.
| Ingredient | Premier Vitamin C | Quantum Vitamin C |
|---|---|---|
| Vitamin C | 135 mg (150%) | 135 mg (150%) |
| Quercetin | not disclosed | not disclosed |
| Indian Gooseberry | not disclosed | not disclosed |
| Hesperidin | not disclosed | not disclosed |
| Dog Rose | not disclosed | not disclosed |
| Coriander | not disclosed | not disclosed |
Amounts are per serving as DSLD gives them: Premier Vitamin C, 2 capsules; Quantum Vitamin C, 2 capsules. Current labels entered June 2022 and January 2024. Percentages of the Daily Value from 21 CFR 101.9. Source: NIH ODS Dietary Supplement Label Database.
Each product on its own
- Premier Vitamin CPremier Research Labs: every row against all products listing it
- Quantum Vitamin CQuantum Nutrition Labs: every row against all products listing it